1. Решите
а) (2x^{3} - x^{2} +3 x-1)+(-7 x^{2} -5 x+4)=
б) (5 x^{2} -4 x+3)-(3 x^{2} - x+2)=
2. Найдите р(а)=р1(а)+р2(а),если
в) р1(а)=3а-4; р2(а)=11-3а;
г) р1(а)=-4-3а; р2(а)=7-8а.
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